.s_page>button:nth-child(1),
.s_page>input{
    border-radius:5px 0px 0px 5px;
    border-right:0px none transparent;
}
.s_page>button:nth-child(3),
.s_page>button:nth-child(5){
    border-radius:0px 5px 5px 0px;
}
.s_page>span>button{
    border-radius:0px;
    border-right:0px none transparent;
}
.s_page>input{
    margin-left:5px;
}